Green hides sins and stains easier than a lighter color. From hand-height down is 90% more likely to get stained and marred than above that mark. Having been a janitor decades before, that's how it was explained to me. Green is less oppressive than dark blue,black or crap brown, and has less psychological baggage.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!